package com.zjm.structural.proxy.demo02_dynamic;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

/**
 *
 */
public class ProxyFactory {

    // 维护一个目标对象
    private Object target;

    public ProxyFactory(Object target) {
        this.target = target;
    }

    /**
     * 给目标对象生成一个代理对象
     * @return
     */
    public Object getProxyInstance() {
        return Proxy.newProxyInstance(target.getClass().getClassLoader(), target.getClass().getInterfaces(), new InvocationHandler() {
            @Override
            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                System.out.println("JDK代理开始····");
                // 反射机制调用目标对象方法
                Object returnVal = method.invoke(target, args);
                System.out.println("JDK代理提交");
                return returnVal;
            }
        });
    }
}
